Development of material formula and structure property indicators for low cold-resistant characterization of Cables Material
Alpine regions account for about 27.9%of total land area in China.Northeast China,Inner Mongolia,Northwest China and other regions are located in alpine regions,wherein the above regions are rich in energy.However,the low-temperature impact embrittlement temperature of traditional PVC cable materials is between-15℃ and-20℃,which is far lower than actual operation requirements.Cable insulation and sheath are always damaged during cable laying in alpine regions.Therefore,it is urgent to develop low-temperature-resistant cables applicable to low-temperature environment in alpine regions,and safe and stable operation of power grids in the alpine regions can be guaranteed.In the paper,cold-resistant PVC formula systems were mainly trial-manufactured and studied.Appropriate production technologies and formulas were determined through selecting raw materials and modified materials.The low-temperature impact embrittlement temperature was adjusted below-50℃ under the precondition that PVC cable materials met national standard property requirements.Cold-resistant PVC cable materials were prepared,which were characterized by excellent physical and mechanical properties,and sound extrusion process,and cold-resistant PVC cable materials can meet production requirements of low-temperature-resistant cables.Meanwhile,the prepared cold-resistant cable material was used for extruding finished product cables and trial-manufacturing sample cables.Type tests of low temperature elongation ratio,15min withstand voltage,etc.were completed for 35kV and lower sample cables in Mohe Low-temperature Test Site.All properties were consistent with standard requirements.
W Sun Y G Cai Y M Feng Y L Li H Y Zhou Y Zhou
Electric Power Research Institute of State Grid Heilongjiang Electric Power Company Limited,Harbin 1 State Grid Heilongjiang Electric Power Company Limited,Harbin 150090 State Grid Heilongjiang Electric Power Equipment and Materials Company,Harbin 150000
国际会议
三亚
英文
1-11
2017-11-18（万方平台首次上网日期，不代表论文的发表时间）